REVENUE - Net Revenue Earned by Category of Payer (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net revenue	$ 3,944,735	$ 3,438,640	$ 3,032,610
Commercial payers
Disaggregation of Revenue [Line Items]
Net revenue	3,421,888	2,971,900	2,618,112
Government payers
Disaggregation of Revenue [Line Items]
Net revenue	477,818	417,088	374,940
Patients
Disaggregation of Revenue [Line Items]
Net revenue	$ 45,029	$ 49,652	$ 39,558